Beam-form and joist for concrete structures.



R. ANDERSON BEAM FORM AND JOIST FOR CONCRETE STRUCTURES.

APPLIGATION FILED DEC). 27, 1910.

1,015,279. I Patented Jan. 23, 1912.

UNITED STATES L TY FmE.

7 ROBERT Annnnson, or "CINCINNATI, 01110.

BEAM-FORM AND JoIsT For; CONCRETE s'rrwc'runns.

T 0 all whom it may concern.

Be it known that I, ROBERT ANDERSON, a citizen of the UnitedStatcs. of America, and resident of Cincinnati, county of Hamilton, and State of Ohio, have invented certain new and useful Improvements in Beam-Forms and J oists for Concrete Structures, of which the following is a specification. c c This invention relates to concrete con struction, and particularlythe construction of beam forms and the arrangements of joist for supporting the floor paneLforms. In concrete construction, it is desirable to so construct the separate forms, that each. form will cooperate with the other forms in the assembled form work, and will perform its function in supporting the other forms and securing them in place. It is also desirable to produce separate forms, which may i be assembled into, and be removed from, an organized form work, without being, dainaged.

An object of this invention is toproduce a form for molding concrete beams, which is provided with means for supporting j oist' forming a part of the organized form work. A further object isto produce an extensible joist for supporting the floor panels of the assembled form work. 7 These and other objects, I attain'byaneans of apparatus embodying the features herein described, and illustrated in the drawings accompanying this application and forming a part of it. I i L In the drawings, I have illustrated in a perspective view portions of beam forms embodying my invention, in connection with extensible joists for supporting the floor panel forms. 4 Referring to the drawings z-Each beam form illustrated consists of a channel-shaped mold, formed of vertical battens 2, cross battens 3, extending between the lower ends of the battens 2 and molding boards 4, which are mounted on the inner faces of the battens 2 and on the outer faces of the battens The vertical battens 2, and, consequently the cross battens 8 are spaced along the length of each beam form, and the coping "5 is mounted on each side of the mold and is secured to the upper ends of the battens 5, so

molding face of the adjacentmolding boards. The overhanging portion of each coping 5 is provided with notches 6, which are located at points immediately adjacent Specification of Letters Patent. Application filed December 27, 1910."

their endsinto the notches 6 Serial No. 599,599.

notch 6 is adapted toreceive an end of a'joist' 7, and is so located that the joist may bear edges 'of'the joist-7, supported by it, will be c flush with the upper ace of the coping 5. After" the beam forms are in place in the assembled form WOI.l the joists 7 are located between adjacent beam forms,

ing them ;on the strips 8. If desired the joist may be temporarily secured to thebattens 2 by able nails.

Any suitable form of joist may be employed, but in the drawings, I have illus trated extensible joist formed of two overlappingpieces 9, which are secured together at their overlapping ends by means of removable or double-headed nails. The pieces are arranged to provide a slight camber in each jolst. I have found byactual experi- Patented Jan. 23, 1912. I

to and on one side of each batten :Each

means of double-headed or removby inserting andby supportment thatjoist formed as illustrated, are as l a single piece of timber. The joist may be varied in length by withdrawing the doubleheaded nails 10 and varying the relative position of the pieces, so as to increase or decrease the length ofthe overlappingjoint. This may be accomplished by using the double-headed nails, without materially instrong and more rigid than joist formed of juring the joist, and their length maybe changed, so that they can be used over and over again in the construction of difl'eren concrete structures. 7

What I claim is:- I g 1. A form for concrete members provided with vertically extending battens,-spaced along the'form, a coping secured to-the battens and provided" with joist-receiving notches, located immediately adjacent to and on one side of the battens, and joist-supporting means securedto the battens.

2 A form for concrete members provided with vertically extending battens spaced along the form, a coping secured to the bat-7 tens and provided with a joist-receiving,

on one side of each batten, and joist-supporting strips extending longitudinally. of the form and secured to the battens.

8. In combination in a form work, beam forms provided with vertically extending notch, located immediately adjacent to" and that its inner end is located flush with the battens spaced longitudinally of the form, coping mounted on the form and provided With a joist-receiving notch, located immediately adjacent to and on one side of each batten, and a j oist-supporting strip mounted on the battens and joist located on said strips With their ends projecting into said notches.

4. A form for concrete members provided With vertically extending battens spaced along the form, a coping secured to the battens and provided With oist-receiving notches, located immediately adjacent to and on one side of each batten, joist-supporting strips extending longitudinally of the form and secured to the battens, and extensible joists whose ends engage the notches in adj acent copings.

ROBERT ANDERSON. Witnesses VALTER F. MURRAY, E. V. MoGALLIsTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

